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        <h3 id="vue-extend"><a href="#vue-extend" class="headerlink" title="vue.extend()"></a>vue.extend()</h3><ul>
<li>vue.extend()是可以理解成注册一个vue的组件构造器，然后可以通过new来实例化这个组件，然后手动挂载到页面上</li>
</ul>
<h2 id="第一种写法"><a href="#第一种写法" class="headerlink" title="第一种写法"></a>第一种写法</h2><h3 id="创建Toast-vue"><a href="#创建Toast-vue" class="headerlink" title="创建Toast.vue"></a>创建Toast.vue</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br></pre></td><td class="code"><pre><span class="line">&lt;template&gt;</span><br><span class="line">  &lt;div <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;wrap&quot;</span> v-<span class="keyword">if</span>=<span class="string">&quot;show&quot;</span> :<span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;show ?&#x27;fadein&#x27;:&#x27;fadeout&#x27;&quot;</span>&gt;&#123;&#123;text&#125;&#125;&lt;/div&gt;</span><br><span class="line">&lt;/template&gt;</span><br><span class="line">&lt;style scoped&gt;</span><br><span class="line">.wrap &#123;</span><br><span class="line">  position: fixed;</span><br><span class="line">  left: <span class="number">50</span>%;</span><br><span class="line">  top: <span class="number">50</span>%;</span><br><span class="line">  background: rgba(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0.35</span>);</span><br><span class="line">  padding: 10px;</span><br><span class="line">  border-radius: 5px;</span><br><span class="line">  transform: translate(-<span class="number">50</span>%, -<span class="number">50</span>%);</span><br><span class="line">  color: #fff;</span><br><span class="line">&#125;</span><br><span class="line">.fadein &#123;</span><br><span class="line">  animation: animate_in <span class="number">0.</span>25s;</span><br><span class="line">&#125;</span><br><span class="line">.fadeout &#123;</span><br><span class="line">  animation: animate_out <span class="number">0.</span>25s;</span><br><span class="line">  opacity: <span class="number">0</span>;</span><br><span class="line">&#125;</span><br><span class="line">@keyframes animate_in &#123;</span><br><span class="line">  <span class="number">0</span>% &#123;</span><br><span class="line">    opacity: <span class="number">0</span>;</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="number">100</span>% &#123;</span><br><span class="line">    opacity: <span class="number">1</span>;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line">@keyframes animate_out &#123;</span><br><span class="line">  <span class="number">0</span>% &#123;</span><br><span class="line">    opacity: <span class="number">1</span>;</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="number">100</span>% &#123;</span><br><span class="line">    opacity: <span class="number">0</span>;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line">&lt;/style&gt;</span><br></pre></td></tr></table></figure>

<h3 id="创建index-js"><a href="#创建index-js" class="headerlink" title="创建index.js"></a>创建index.js</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> vue <span class="keyword">from</span> <span class="string">&#x27;vue&#x27;</span></span><br><span class="line"><span class="keyword">import</span> toastComponent <span class="keyword">from</span> <span class="string">&#x27;./Toast.vue&#x27;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 创建一个构造器</span></span><br><span class="line"><span class="keyword">const</span> ToastConstructor = vue.extend(toastComponent)  <span class="comment">// 这里相当于在components里面注册一个组件</span></span><br><span class="line"><span class="comment">// 个人理解：这里相当于:compoents:&#123;Toast&#125;</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 个人理解：这里相当于使用组件并传参 &lt;Toast show=&quot;true&quot; text=&quot;传入的内容&quot;&gt;&lt;/Toast&gt;</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">showToast</span>(<span class="params">text, duration = <span class="number">2000</span></span>) </span>&#123;</span><br><span class="line">    <span class="comment">// 实例化组件</span></span><br><span class="line">    <span class="keyword">const</span> toastDom = <span class="keyword">new</span> ToastConstructor(&#123;</span><br><span class="line">        el: <span class="built_in">document</span>.createElement(<span class="string">&#x27;div&#x27;</span>), <span class="comment">// 实例创建好之后自动挂载到该元素上</span></span><br><span class="line">        <span class="function"><span class="title">data</span>(<span class="params"></span>)</span> &#123; <span class="comment">// 传入组件的一些配置</span></span><br><span class="line">            <span class="keyword">return</span> &#123;</span><br><span class="line">                text: text,</span><br><span class="line">                show: <span class="literal">true</span></span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;)</span><br><span class="line">    <span class="built_in">console</span>.log(toastDom.$el)</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 把 实例化的 ToastConstructor 添加到 body 里（手动挂载）</span></span><br><span class="line">    <span class="built_in">document</span>.body.appendChild(toastDom.$el)</span><br><span class="line">    <span class="built_in">setTimeout</span>(<span class="function">() =&gt;</span> &#123;</span><br><span class="line">        toastDom.show = <span class="literal">false</span></span><br><span class="line">    &#125;, duration)</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 注册为全局组件的函数</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">registryToast</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="comment">// 将组件注册到 vue 的 原型链里去,</span></span><br><span class="line">    <span class="comment">// 这样就可以在所有 vue 的实例里面使用 this.$toast()</span></span><br><span class="line">    vue.prototype.$toast = showToast</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> registryToast</span><br></pre></td></tr></table></figure>

<h3 id="全局引入"><a href="#全局引入" class="headerlink" title="全局引入"></a>全局引入</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> registryToast <span class="keyword">from</span> <span class="string">&#x27;index.js&#x27;</span></span><br><span class="line">Vue.use(registryToast)</span><br></pre></td></tr></table></figure>

<h2 id="第二种写法（建议使用第二种，第二种方法暴露出了一个install方法，可以发布到npm上）"><a href="#第二种写法（建议使用第二种，第二种方法暴露出了一个install方法，可以发布到npm上）" class="headerlink" title="第二种写法（建议使用第二种，第二种方法暴露出了一个install方法，可以发布到npm上）"></a>第二种写法（建议使用第二种，第二种方法暴露出了一个install方法，可以发布到npm上）</h2><h3 id="创建Toast-vue-1"><a href="#创建Toast-vue-1" class="headerlink" title="创建Toast.vue"></a>创建Toast.vue</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line">&lt;template&gt;</span><br><span class="line">  &lt;div <span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;wrap&quot;</span> v-<span class="keyword">if</span>=<span class="string">&quot;show&quot;</span> :<span class="class"><span class="keyword">class</span></span>=<span class="string">&quot;show ?&#x27;fadein&#x27;:&#x27;fadeout&#x27;&quot;</span>&gt;&#123;&#123;text&#125;&#125;&lt;/div&gt;</span><br><span class="line">&lt;/template&gt;</span><br><span class="line">&lt;script&gt;</span><br><span class="line">  <span class="keyword">export</span> <span class="keyword">default</span> &#123;</span><br><span class="line">    <span class="function"><span class="title">data</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">      retuen&#123;</span><br><span class="line">        text:<span class="string">&quot;,</span></span><br><span class="line"><span class="string">        show:false</span></span><br><span class="line"><span class="string">      &#125;</span></span><br><span class="line"><span class="string">    &#125;</span></span><br><span class="line"><span class="string">  &#125;</span></span><br><span class="line"><span class="string">&lt;/script&gt;</span></span><br><span class="line"><span class="string">&lt;style scoped&gt;</span></span><br><span class="line"><span class="string">.wrap &#123;</span></span><br><span class="line"><span class="string">  position: fixed;</span></span><br><span class="line"><span class="string">  left: 50%;</span></span><br><span class="line"><span class="string">  top: 50%;</span></span><br><span class="line"><span class="string">  background: rgba(0, 0, 0, 0.35);</span></span><br><span class="line"><span class="string">  padding: 10px;</span></span><br><span class="line"><span class="string">  border-radius: 5px;</span></span><br><span class="line"><span class="string">  transform: translate(-50%, -50%);</span></span><br><span class="line"><span class="string">  color: #fff;</span></span><br><span class="line"><span class="string">&#125;</span></span><br><span class="line"><span class="string">.fadein &#123;</span></span><br><span class="line"><span class="string">  animation: animate_in 0.25s;</span></span><br><span class="line"><span class="string">&#125;</span></span><br><span class="line"><span class="string">.fadeout &#123;</span></span><br><span class="line"><span class="string">  animation: animate_out 0.25s;</span></span><br><span class="line"><span class="string">  opacity: 0;</span></span><br><span class="line"><span class="string">&#125;</span></span><br><span class="line"><span class="string">@keyframes animate_in &#123;</span></span><br><span class="line"><span class="string">  0% &#123;</span></span><br><span class="line"><span class="string">    opacity: 0;</span></span><br><span class="line"><span class="string">  &#125;</span></span><br><span class="line"><span class="string">  100% &#123;</span></span><br><span class="line"><span class="string">    opacity: 1;</span></span><br><span class="line"><span class="string">  &#125;</span></span><br><span class="line"><span class="string">&#125;</span></span><br><span class="line"><span class="string">@keyframes animate_out &#123;</span></span><br><span class="line"><span class="string">  0% &#123;</span></span><br><span class="line"><span class="string">    opacity: 1;</span></span><br><span class="line"><span class="string">  &#125;</span></span><br><span class="line"><span class="string">  100% &#123;</span></span><br><span class="line"><span class="string">    opacity: 0;</span></span><br><span class="line"><span class="string">  &#125;</span></span><br><span class="line"><span class="string">&#125;</span></span><br><span class="line"><span class="string">&lt;/style&gt;</span></span><br></pre></td></tr></table></figure>

<h3 id="创建index-js-1"><a href="#创建index-js-1" class="headerlink" title="创建index.js"></a>创建index.js</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> ToastComponent <span class="keyword">from</span> <span class="string">&#x27;./Toast&#x27;</span>;</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> toast = &#123;&#125;</span><br><span class="line">toast.instal = <span class="function">(<span class="params">Vue</span>) =&gt;</span> &#123;                          <span class="comment">// 必须暴露出一个install方法，第一个参数是Vue构造器，第二个参数是一个可选的options对象</span></span><br><span class="line">    <span class="keyword">const</span> newToastCom = Vue.extend(ToastComponent);  <span class="comment">// 创建一个构造器</span></span><br><span class="line">    <span class="keyword">const</span> init = <span class="keyword">new</span> newToastCom();                  <span class="comment">// 实例化</span></span><br><span class="line">    init.$mount(<span class="built_in">document</span>.createElement(<span class="string">&#x27;div&#x27;</span>));      <span class="comment">// 挂载dom</span></span><br><span class="line">    <span class="built_in">document</span>.body.appendChild(init.$el)              <span class="comment">// 添加到body后面</span></span><br><span class="line">    Vue.prototype.$toast = <span class="function">(<span class="params">content, duration = <span class="number">3000</span></span>) =&gt;</span> &#123;  <span class="comment">// 给vue原型添加toast方法</span></span><br><span class="line">        init.show = <span class="literal">true</span>;</span><br><span class="line">        init.text = content;   <span class="comment">// 接收的参数赋值给Toast.vue 中的参数</span></span><br><span class="line">        <span class="built_in">setTimeout</span>(<span class="function">() =&gt;</span> &#123;</span><br><span class="line">            init.show = <span class="literal">false</span>;</span><br><span class="line">        &#125;, duration)</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> toast;</span><br></pre></td></tr></table></figure>

<h3 id="全局引入-1"><a href="#全局引入-1" class="headerlink" title="全局引入"></a>全局引入</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> toast <span class="keyword">from</span> <span class="string">&#x27;index.js&#x27;</span></span><br><span class="line">Vue.use(toast)</span><br></pre></td></tr></table></figure>

<h3 id="使用"><a href="#使用" class="headerlink" title="使用"></a>使用</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">this</span>.$toast(<span class="string">&quot;提示信息&quot;</span>);</span><br></pre></td></tr></table></figure>

<h3 id="总结："><a href="#总结：" class="headerlink" title="总结："></a>总结：</h3><ul>
<li>步骤：以Toast组件为基础，创建一个构造器，然后实例化组件，然后挂载到dom节点上并插入到body</li>
<li>不同点：第一种写法是在实例化组件的时候传入data函数，用于接收参数用来控制标签的显隐等操作，在Toast.vue组件中可以写data函数也可以不写；第二种写法，创建一个空对象，空对象中添加一个方法，方法接收参数，复制给data函数里面的变量，所以Toast.vue组件里面必须声明有data函数</li>
</ul>
<h3 id="发布npm"><a href="#发布npm" class="headerlink" title="发布npm"></a>发布npm</h3><ul>
<li>package.json文件中必须包含以下三个属性：<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">  name:<span class="string">&#x27;toast-plg&#x27;</span>  <span class="comment">// 这里的name必须和目录文件夹的名字一样,并且名字也不能和npm线上的插件的名字一样,否则报错</span></span><br><span class="line">  version:<span class="string">&#x27;1.0.0&#x27;</span> <span class="comment">// 注意：本次发布的版本号不能和之前的版本号相同，否则无法发布</span></span><br><span class="line">  main:<span class="string">&#x27;../src/toast/index.js&#x27;</span>  <span class="comment">// 将暴露出install方法的文件作为入口</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></li>
<li>注册npm账号，然后在控制台进行登陆：npm login</li>
<li>发布：npm publish</li>
</ul>

      
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